• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific Tech

I hear these 5.0s run hot...

  • Thread starter Thread starter SableSal
  • Start date Start date Sep 27, 2009
Prev
  • 1
  • 2
  • 3
First Prev 3 of 3

SableSal

Member
Sep 17, 2009
295
3
19
Fresno, Californ-I-A
Oct 6, 2009
#41
  • Oct 6, 2009
  • #41
Chythar said:
You are either burning coolant, your radiator is cracked or your hose clamps aren't tight enough. The latter two would not let the coolant get up to 16psi, thus making the coolant get hotter faster. Are you loosing coolant? Pop the radiator cap and make sure your radiator isn't half empty.

I'd also recommend a coolant pressure test. I would lend you mine id you were in Los Angeles, but that commute is a killer.
Click to expand...

Well, let me let you all know what I'm planning on doing here really soon...

I'm replacing the radiator with a Mishimoto 3Row All Aluminum Radiator. I'm getting a new Coolant Temp Gauge and Voltage Gauge. I'm buying a gauge bezel that will house my new gauges so it still keeps a factory feel. I think on the gauges, I will be using digital gauges.

Maybe a high flow water pump,... but I think that radiator will work the best.

Anyhow, gimme some feedback and let me know what you all think.
 
9

94gtfreak

Active Member
Oct 19, 2008
412
4
39
your moms house
Oct 6, 2009
#42
  • Oct 6, 2009
  • #42
Well.....I figured out my problem.....COOLANT IN THE OIL!!! URGH!!!!
 

Chythar

Recently finished repairing my rear
20+ Year Stangneter
Aug 26, 2004
2,373
140
113
Foothill Ranch, CA
Oct 6, 2009
#43
  • Oct 6, 2009
  • #43
94gtfreak said:
Well.....I figured out my problem.....COOLANT IN THE OIL!!! URGH!!!!
Click to expand...

Ow...sorry to hear that.
 
9

94gtfreak

Active Member
Oct 19, 2008
412
4
39
your moms house
Oct 6, 2009
#44
  • Oct 6, 2009
  • #44
Na it's cool. I finally get to use my expensive a$$ tool set the school gave me and get to do some serious work on my car, so it's not all bad. Anyone got any good write ups on replacing a set of head gaskets?
 

toyman

10 Year Member
Jul 19, 2007
1,944
54
79
Vernon BC
Oct 6, 2009
#45
  • Oct 6, 2009
  • #45
Chythar said:
You are either burning coolant, your radiator is cracked or your hose clamps aren't tight enough. The latter two would not let the coolant get up to 16psi, thus making the coolant get hotter faster.
Click to expand...

Not quite right. Raising the pressure merely increases the boiling point. The coolant doesn't get hotter faster. Remember that experiment in science class when you reduced the pressure (vacuum) the water would boil at room temperature. Same principle with increased pressure. Just prevents the coolant from boiling at a lower temperature.

I'd also recommend a coolant pressure test. I would lend you mine id you were in Los Angeles, but that commute is a killer.
Click to expand...

A coolant pressure test is almost a must. If the system doesn't hold pressure it's leaking somewhere.
 
9

94gtfreak

Active Member
Oct 19, 2008
412
4
39
your moms house
Oct 6, 2009
#46
  • Oct 6, 2009
  • #46
That does make really good sense and I didn't think of that! But, uh...I found my leak...it's a head gasket.
 

Chythar

Recently finished repairing my rear
20+ Year Stangneter
Aug 26, 2004
2,373
140
113
Foothill Ranch, CA
Oct 6, 2009
#47
  • Oct 6, 2009
  • #47
toyman said:
Not quite right. Raising the pressure merely increases the boiling point. The coolant doesn't get hotter faster. Remember that experiment in science class when you reduced the pressure (vacuum) the water would boil at room temperature. Same principle with increased pressure. Just prevents the coolant from boiling at a lower temperature.
Click to expand...

About all I remember of high school is getting beat up often by the jocks.

Thanks for the info, I'll remember it.
 

SableSal

Member
Sep 17, 2009
295
3
19
Fresno, Californ-I-A
Oct 7, 2009
#48
  • Oct 7, 2009
  • #48
94gtfreak said:
That does make really good sense and I didn't think of that! But, uh...I found my leak...it's a head gasket.
Click to expand...
Damn, sorry to hear. I'll be looking a tad more into it this weekend. I guess I should check my oil too Although, I'm not loosing any coolant. Oh well, I gotta change the oil anyways... lol!
 
9

94gtfreak

Active Member
Oct 19, 2008
412
4
39
your moms house
Oct 24, 2009
#49
  • Oct 24, 2009
  • #49
So SableSal..did you ever figure out your temp problems?
 

94GTCoupe

10 Year Member
May 7, 2006
1,412
92
79
CA
Oct 24, 2009
#50
  • Oct 24, 2009
  • #50
Posted via Mobile Device
just saw him today.
new mishimoto,and an actual coolant gauge.
he did'nt mention anymore oveheating issues.
 
Prev
  • 1
  • 2
  • 3
First Prev 3 of 3
You must log in or register to reply here.

Similar threads

Engine Themostat
  • Mindseye007
  • Jan 30, 2026
  • Fox 5.0 Mustang Tech
  • 2
Replies
21
Views
751
Fox 5.0 Mustang Tech Feb 1, 2026
86HO5.0
8
M
Resolved 1988 Foxbody - Overheating Summer
  • MDrisc
  • Oct 26, 2025
  • Fox 5.0 Mustang Tech
Replies
16
Views
685
Fox 5.0 Mustang Tech Jul 17, 2026
fasterthangas
F
D
2004 v6 mustang strange issue with coolant system...heat in cabin comes and goes...
  • daveinfl33777
  • Jun 3, 2024
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
13
Views
1K
1996 - 2004 SN95 Mustang -General/Talk- Jun 3, 2024
daveinfl33777
D
R
Engine Fox body doesn’t run hot until I start driving
  • Rose5oh
  • Mar 17, 2025
  • Fox 5.0 Mustang Tech
  • 2
Replies
20
Views
1K
Fox 5.0 Mustang Tech Jun 7, 2025
limp
J
'96 Cobra: A/C gets weak and engine misfires under load when warm
  • jruhnke
  • Oct 22, 2025
  • SVT Tech Forum
Replies
2
Views
321
SVT Tech Forum Nov 20, 2025
nickyb
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?